/** * @file zones_convert_brd_items_to_polygons_with_Boost.cpp */ /* * This program source code file is part of KiCad, a free EDA CAD application. * * Copyright (C) 2012 Jean-Pierre Charras, jean-pierre.charras@ujf-grenoble.fr * Copyright (C) 1992-2012 KiCad Developers, see AUTHORS.txt for contributors. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, you may find one here: * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html * or you may search the http://www.gnu.org website for the version 2 license, * or you may write to the Free Software Foundation, Inc., * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */ /* Functions to convert some board items to polygons * (pads, tracks ..) * This is used to calculate filled areas in copper zones. * Filled areas are areas remainder of the full zone area after removed all polygons * calculated from these items shapes and the clearance area * * Important note: * Because filled areas must have a minimum thickness to match with Design rule, they are * draw in 2 step: * 1 - filled polygons are drawn * 2 - polygon outlines are drawn with a "minimum thickness width" ( or with a minimum * thickness pen ) * So outlines of filled polygons are calculated with the constraint they match with clearance, * taking in account outlines have thickness * This ensures: * - areas meet the minimum thickness requirement. * - shapes are smoothed. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include extern void BuildUnconnectedThermalStubsPolygonList( CPOLYGONS_LIST& aCornerBuffer, BOARD* aPcb, ZONE_CONTAINER* aZone, double aArcCorrection, double aRoundPadThermalRotation); extern void Test_For_Copper_Island_And_Remove( BOARD* aPcb, ZONE_CONTAINER* aZone_container ); extern void CreateThermalReliefPadPolygon( CPOLYGONS_LIST& aCornerBuffer, D_PAD& aPad, int aThermalGap, int aCopperThickness, int aMinThicknessValue, int aCircleToSegmentsCount, double aCorrectionFactor, double aThermalRot ); // Local Variables: static double s_thermalRot = 450; // angle of stubs in thermal reliefs for round pads // how many segments are used to create a polygon from a circle: static int s_CircleToSegmentsCount = ARC_APPROX_SEGMENTS_COUNT_LOW_DEF; /* default value. the real value will be changed to * ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF * if m_ArcToSegmentsCount == ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF */ double s_Correction; /* mult coeff used to enlarge rounded and oval pads (and vias) * because the segment approximation for arcs and circles * create a smaller gap than a true circle */ /** * Function AddClearanceAreasPolygonsToPolysList * Supports a min thickness area constraint. * Add non copper areas polygons (pads and tracks with clearance) * to the filled copper area found * in BuildFilledPolysListData after calculating filled areas in a zone * Non filled copper areas are pads and track and their clearance areas * The filled copper area must be computed just before. * BuildFilledPolysListData() call this function just after creating the * filled copper area polygon (without clearance areas) * to do that this function: * 1 - Creates the main outline (zone outline) using a correction to shrink the resulting area * with m_ZoneMinThickness/2 value. * The result is areas with a margin of m_ZoneMinThickness/2 * When drawing outline with segments having a thickness of m_ZoneMinThickness, the * outlines will match exactly the initial outlines * 3 - Add all non filled areas (pads, tracks) in group B with a clearance of m_Clearance + * m_ZoneMinThickness/2 * in a buffer * - If Thermal shapes are wanted, add non filled area, in order to create these thermal shapes * 4 - calculates the polygon A - B * 5 - put resulting list of polygons (filled areas) in m_FilledPolysList * This zone contains pads with the same net. * 6 - Remove insulated copper islands * 7 - If Thermal shapes are wanted, remove unconnected stubs in thermal shapes: * creates a buffer of polygons corresponding to stubs to remove * sub them to the filled areas. * Remove new insulated copper islands */ void ZONE_CONTAINER::AddClearanceAreasPolygonsToPolysList( BOARD* aPcb ) { // Set the number of segments in arc approximations if( m_ArcToSegmentsCount == ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF ) s_CircleToSegmentsCount = ARC_APPROX_SEGMENTS_COUNT_HIGHT_DEF; else s_CircleToSegmentsCount = ARC_APPROX_SEGMENTS_COUNT_LOW_DEF; /* calculates the coeff to compensate radius reduction of holes clearance * due to the segment approx. * For a circle the min radius is radius * cos( 2PI / s_CircleToSegmentsCount / 2) * s_Correction is 1 /cos( PI/s_CircleToSegmentsCount ) */ s_Correction = 1.0 / cos( M_PI / s_CircleToSegmentsCount ); // This KI_POLYGON_SET is the area(s) to fill, with m_ZoneMinThickness/2 KI_POLYGON_SET polyset_zone_solid_areas; int margin = m_ZoneMinThickness / 2; /* First, creates the main polygon (i.e. the filled area using only one outline) * to reserve a m_ZoneMinThickness/2 margin around the outlines and holes * this margin is the room to redraw outlines with segments having a width set to * m_ZoneMinThickness * so m_ZoneMinThickness is the min thickness of the filled zones areas * the main polygon is stored in polyset_zone_solid_areas */ CopyPolygonsFromFilledPolysListToKiPolygonList( polyset_zone_solid_areas ); polyset_zone_solid_areas -= margin; if( polyset_zone_solid_areas.size() == 0 ) return; /* Calculates the clearance value that meet DRC requirements * from m_ZoneClearance and clearance from the corresponding netclass * We have a "local" clearance in zones because most of time * clearance between a zone and others items is bigger than the netclass clearance * this is more true for small clearance values * Note also the "local" clearance is used for clearance between non copper items * or items like texts on copper layers */ int zone_clearance = std::max( m_ZoneClearance, GetClearance() ); zone_clearance += margin; /* store holes (i.e. tracks and pads areas as polygons outlines) * in a polygon list */ /* items ouside the zone bounding box are skipped * the bounding box is the zone bounding box + the biggest clearance found in Netclass list */ EDA_RECT item_boundingbox; EDA_RECT zone_boundingbox = GetBoundingBox(); int biggest_clearance = aPcb->GetDesignSettings().GetBiggestClearanceValue(); biggest_clearance = std::max( biggest_clearance, zone_clearance ); zone_boundingbox.Inflate( biggest_clearance ); /* * First : Add pads. Note: pads having the same net as zone are left in zone. * Thermal shapes will be created later if necessary */ int item_clearance; // static to avoid unnecessary memory allocation when filling many zones. static CPOLYGONS_LIST cornerBufferPolysToSubstract; cornerBufferPolysToSubstract.RemoveAllContours(); /* Use a dummy pad to calculate hole clerance when a pad is not on all copper layers * and this pad has a hole * This dummy pad has the size and shape of the hole * Therefore, this dummy pad is a circle or an oval. * A pad must have a parent because some functions expect a non null parent * to find the parent board, and some other data */ MODULE dummymodule( aPcb ); // Creates a dummy parent D_PAD dummypad( &dummymodule ); for( MODULE* module = aPcb->m_Modules; module; module = module->Next() ) { D_PAD* nextpad; for( D_PAD* pad = module->Pads(); pad != NULL; pad = nextpad ) { nextpad = pad->Next(); // pad pointer can be modified by next code, so // calculate the next pad here if( !pad->IsOnLayer( GetLayer() ) ) { /* Test for pads that are on top or bottom only and have a hole. * There are curious pads but they can be used for some components that are * inside the board (in fact inside the hole. Some photo diodes and Leds are * like this) */ if( pad->GetDrillSize().x == 0 && pad->GetDrillSize().y == 0 ) continue; // Use a dummy pad to calculate a hole shape that have the same dimension as // the pad hole dummypad.SetSize( pad->GetDrillSize() ); dummypad.SetOrientation( pad->GetOrientation() ); dummypad.SetShape( pad->GetDrillShape() == PAD_DRILL_OBLONG ? PAD_OVAL : PAD_CIRCLE ); dummypad.SetPosition( pad->GetPosition() ); pad = &dummypad; } // Note: netcode <=0 means not connected item if( ( pad->GetNetCode() != GetNetCode() ) || ( pad->GetNetCode() <= 0 ) ) { item_clearance = pad->GetClearance() + margin; item_boundingbox = pad->GetBoundingBox(); item_boundingbox.Inflate( item_clearance ); if( item_boundingbox.Intersects( zone_boundingbox ) ) { int clearance = std::max( zone_clearance, item_clearance ); pad->TransformShapeWithClearanceToPolygon( cornerBufferPolysToSubstract, clearance, s_CircleToSegmentsCount, s_Correction ); } continue; } if( ( GetPadConnection( pad ) == PAD_NOT_IN_ZONE ) || ( pad->GetShape() == PAD_TRAPEZOID ) ) // PAD_TRAPEZOID shapes are not in zones because they are used in microwave apps // and i think it is good that shapes are not changed by thermal pads or others { int gap = zone_clearance; int thermalGap = GetThermalReliefGap( pad ); gap = std::max( gap, thermalGap ); item_boundingbox = pad->GetBoundingBox(); if( item_boundingbox.Intersects( zone_boundingbox ) ) { pad->TransformShapeWithClearanceToPolygon( cornerBufferPolysToSubstract, gap, s_CircleToSegmentsCount, s_Correction ); } } } } /* Add holes (i.e. tracks and vias areas as polygons outlines) * in cornerBufferPolysToSubstract */ for( TRACK* track = aPcb->m_Track; track; track = track->Next() ) { if( !track->IsOnLayer( GetLayer() ) ) continue; if( track->GetNetCode() == GetNetCode() && (GetNetCode() != 0) ) continue; item_clearance = track->GetClearance() + margin; item_boundingbox = track->GetBoundingBox(); if( item_boundingbox.Intersects( zone_boundingbox ) ) { int clearance = std::max( zone_clearance, item_clearance ); track->TransformShapeWithClearanceToPolygon( cornerBufferPolysToSubstract, clearance, s_CircleToSegmentsCount, s_Correction ); } } /* Add module edge items that are on copper layers * Pcbnew allows these items to be on copper layers in microwave applictions * This is a bad thing, but must be handle here, until a better way is found */ for( MODULE* module = aPcb->m_Modules; module; module = module->Next() ) { for( BOARD_ITEM* item = module->GraphicalItems(); item; item = item->Next() ) { if( !item->IsOnLayer( GetLayer() ) ) continue; if( item->Type() != PCB_MODULE_EDGE_T ) continue; item_boundingbox = item->GetBoundingBox(); if( item_boundingbox.Intersects( zone_boundingbox ) ) { ( (EDGE_MODULE*) item )->TransformShapeWithClearanceToPolygon( cornerBufferPolysToSubstract, zone_clearance, s_CircleToSegmentsCount, s_Correction ); } } } // Add graphic items (copper texts) and board edges for( BOARD_ITEM* item = aPcb->m_Drawings; item; item = item->Next() ) { if( item->GetLayer() != GetLayer() && item->GetLayer() != EDGE_N ) continue; switch( item->Type() ) { case PCB_LINE_T: ( (DRAWSEGMENT*) item )->TransformShapeWithClearanceToPolygon( cornerBufferPolysToSubstract, zone_clearance, s_CircleToSegmentsCount, s_Correction ); break; case PCB_TEXT_T: ( (TEXTE_PCB*) item )->TransformBoundingBoxWithClearanceToPolygon( cornerBufferPolysToSubstract, zone_clearance ); break; default: break; } } // Add zones outlines having an higher priority and keepout for( int ii = 0; ii < GetBoard()->GetAreaCount(); ii++ ) { ZONE_CONTAINER* zone = GetBoard()->GetArea( ii ); if( zone->GetLayer() != GetLayer() ) continue; if( !zone->GetIsKeepout() && zone->GetPriority() <= GetPriority() ) continue; if( zone->GetIsKeepout() && ! zone->GetDoNotAllowCopperPour() ) continue; // A highter priority zone or keepout area is found: remove its area item_boundingbox = zone->GetBoundingBox(); if( !item_boundingbox.Intersects( zone_boundingbox ) ) continue; // Add the zone outline area. // However if the zone has the same net as the current zone, // do not add clearance. // the zone will be connected to the current zone, but filled areas // will use different parameters (clearance, thermal shapes ) bool addclearance = GetNetCode() != zone->GetNetCode(); int clearance = zone_clearance; if( zone->GetIsKeepout() ) { addclearance = true; clearance = m_ZoneMinThickness / 2; } zone->TransformOutlinesShapeWithClearanceToPolygon( cornerBufferPolysToSubstract, clearance, addclearance ); } // Remove thermal symbols for( MODULE* module = aPcb->m_Modules; module; module = module->Next() ) { for( D_PAD* pad = module->Pads(); pad != NULL; pad = pad->Next() ) { // Rejects non-standard pads with tht-only thermal reliefs if( GetPadConnection( pad ) == THT_THERMAL && pad->GetAttribute() != PAD_STANDARD ) continue; if( GetPadConnection( pad ) != THERMAL_PAD && GetPadConnection( pad ) != THT_THERMAL ) continue; if( !pad->IsOnLayer( GetLayer() ) ) continue; if( pad->GetNetCode() != GetNetCode() ) continue; item_boundingbox = pad->GetBoundingBox(); int thermalGap = GetThermalReliefGap( pad ); item_boundingbox.Inflate( thermalGap, thermalGap ); if( item_boundingbox.Intersects( zone_boundingbox ) ) { CreateThermalReliefPadPolygon( cornerBufferPolysToSubstract, *pad, thermalGap, GetThermalReliefCopperBridge( pad ), m_ZoneMinThickness, s_CircleToSegmentsCount, s_Correction, s_thermalRot ); } } } // cornerBufferPolysToSubstract contains polygons to substract. // polyset_zone_solid_areas contains the main filled area // Calculate now actual solid areas if( cornerBufferPolysToSubstract.GetCornersCount() > 0 ) { KI_POLYGON_SET polyset_holes; cornerBufferPolysToSubstract.ExportTo( polyset_holes ); // Remove holes from initial area.: polyset_zone_solid_areas -= polyset_holes; } // put solid areas in m_FilledPolysList: m_FilledPolysList.RemoveAllContours(); CopyPolygonsFromKiPolygonListToFilledPolysList( polyset_zone_solid_areas ); // Remove insulated islands: if( GetNetCode() > 0 ) TestForCopperIslandAndRemoveInsulatedIslands( aPcb ); // Now we remove all unused thermal stubs. cornerBufferPolysToSubstract.RemoveAllContours(); // Test thermal stubs connections and add polygons to remove unconnected stubs. // (this is a refinement for thermal relief shapes) if( GetNetCode() > 0 ) BuildUnconnectedThermalStubsPolygonList( cornerBufferPolysToSubstract, aPcb, this, s_Correction, s_thermalRot ); // remove copper areas corresponding to not connected stubs if( cornerBufferPolysToSubstract.GetCornersCount() ) { KI_POLYGON_SET polyset_holes; cornerBufferPolysToSubstract.ExportTo( polyset_holes ); // Remove unconnected stubs polyset_zone_solid_areas -= polyset_holes; // put these areas in m_FilledPolysList m_FilledPolysList.RemoveAllContours(); CopyPolygonsFromKiPolygonListToFilledPolysList( polyset_zone_solid_areas ); if( GetNetCode() > 0 ) TestForCopperIslandAndRemoveInsulatedIslands( aPcb ); } cornerBufferPolysToSubstract.RemoveAllContours(); } void ZONE_CONTAINER::CopyPolygonsFromKiPolygonListToFilledPolysList( KI_POLYGON_SET& aKiPolyList ) { m_FilledPolysList.RemoveAllContours(); m_FilledPolysList.ImportFrom( aKiPolyList ); } void ZONE_CONTAINER::CopyPolygonsFromFilledPolysListToKiPolygonList( KI_POLYGON_SET& aKiPolyList ) { m_FilledPolysList.ExportTo( aKiPolyList ); }